Two companies are both working to develop new shoe designs for their country's basketball team. The shoes are intended to help the players jump higher.

Which of the following conditions would result in a time constraint for the companies' designs?
A.
the players need to like the way the shoes look
B.
an important international tournament begins in eight months
C.
the shoes need to prevent players' ankles from turning
D.
the materials used in making the shoes must be biodegradable